French police have seized a record 1.4 tonnes of cocaine and arrested four people in a "severe blow" to an international drug trafficking chain.
French police sources said on Friday that the drugs were seized on Wednesday at the northern port of Le Havre and were hidden in tyres on a cargo ship from Valparaiso in Chile.
Two Spaniards were arrested in France after the seizure, which came after a "long and thorough" investigation, police said.
Two Bulgarians, believed to be organisers of the trafficking, were also arrested by local police in the eastern Varna province.
More arrests were also expected in Spain.
Police said the seized cocaine had a street value of about 270 million euros ($A411 million).
Interior Minister Manuel Valls was to make a statement on the case later on Friday.
The previous record cocaine haul in France was the seizure in September of 1.3 tonnes of the drug, hidden in 30 suitcases, from an Air France flight from Venezuela.
More than 20 people, including an Air France employee in Caracas, were jailed in that case.
